<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Visibility (single point)</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">1</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">(c) 2001 by O.Conrad</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid, interactive</td></tr></table><hr><h4>Description</h4><hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Elevation </td><td>Grid (input)</td><td>ELEVATION</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Visibility</td><td>Grid (output)</td><td>VISIBILITY</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Height</td><td>Floating point</td><td>HEIGHT</td><td>Height of the light source above ground.</td><td>Default: 100.000000</td></tr><tr><td>Unit</td><td>Choice</td><td>METHOD</td><td></td><td>Available Choices:
[0] Visibility
[1] Shade
[2] Distance
[3] Size
Default: 1</td></tr><tr><td>Multiple Observer</td><td>Boolean</td><td>MULTIPLE_OBS</td><td>Allow multiple observer positions.</td><td>Default: 0</td></tr></table>